Characteristics of azaleas and how to care for them: master the key points for more abundant blooms
Azalea is the collective name for plants in the genus Rhododendron of the family Ericaceae, also known as yingshanhong and shanshiliu. Along with primroses and gentians, it is known as one of the world's three major alpine flowers, and it is also one of China's traditional famous flowers. It is mostly an evergreen or deciduous shrub, with leathery leaves. The flowers often cluster in several at the tips of the branches, and the flower colors include red, pink, white, and purple. When in full bloom, the whole tree is covered with flowers, giving it strong ornamental value.
There are many species in the genus Rhododendron, and China is an important distribution center. Wild yingshanhong is commonly seen in the mountains and fields of the Yangtze River basin and the southwestern region. In horticulture, they are often divided by flowering period and origin into types such as spring azaleas, summer azaleas, eastern azaleas, and western azaleas. Among them, western azaleas, also called Western azaleas, have a compact plant shape and large, brightly colored flowers, and are very popular among Lunar New Year potted flowers. Different types bloom earlier or later, and reasonable pairing can extend the overall flowering period.
When growing azaleas, the key lies in soil, light, and water. It likes acidic, loose, fertile soil, and dislikes alkaline soil and heavy, waterlogged conditions; it likes a semi-shaded, moist environment, so in summer it should be shaded from strong sun, and in cold winter areas it is best moved indoors. Watering should follow the principle of watering when the soil is dry and letting it dry somewhat between waterings. When the air is dry, water can be sprayed on the leaves and surrounding area to increase humidity; fertilizing should be done lightly and frequently, and after flowering, spent flowers and overly dense branches should be pruned appropriately, which helps flowering the next year.
Azaleas are widely used, suitable both for courtyard planting in the ground and park landscaping, as well as for potted ornamental display on balconies. In daily care, if the leaves turn yellow, it is often caused by soil that is too alkaline or a lack of iron, which can be alleviated by improving the soil's acidity and alkalinity; bud drop and leaf drop are often related to overly frequent watering and poor ventilation. It should be noted that some wild Rhododendron species contain toxins, so they are best mainly enjoyed for viewing, and must not be eaten casually.
